A postmortem X-ray of a male homicide victim reveals a bullet lodged next to his spine. That he was shot is clear. How recently? is what death investigators must determine. The answer: the absence of scar tissue surrounding the bullet proves the victim had been recently shot. And while the average person may find tattoos to be creative and aesthetic, to the trained death investigator, they can actually be the key to aiding in the eventual identification of a body.